package com.example.forum.controller;


import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.config.AppConfig;
import com.example.forum.model.Article;
import com.example.forum.model.Board;
import com.example.forum.model.User;
import com.example.forum.services.IArticleService;
import com.example.forum.services.IBoardService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.ArrayList;
import java.util.List;

@Api(tags = "文章接口")
@Slf4j
@RestController
@RequestMapping("/article")
public class ArticleController {

    @Resource
    private IArticleService articleService;
    @Resource
    private IBoardService boardService;

    /**
     * 发布一个帖子
     * @param boardId 板块Id
     * @param title 文章标题
     * @param content 文章内容
     * @return
     */
    @ApiOperation("发布新帖")
    @PostMapping("/create")
    public AppResult create(HttpServletRequest request,
                            @ApiParam("板块Id") @RequestParam("boardId") @NonNull Long boardId,
                            @ApiParam("文章标题") @RequestParam("title") @NonNull String title,
                            @ApiParam("文章内容") @RequestParam("content") @NonNull String content){
        //校验用户是否校验
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        if (user.getState()==1){
            //用户已禁言
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //板块的校验
        Board board = boardService.selectById(boardId.longValue());
        if (board==null||board.getDeleteState()==1||board.getState()==1){
            //打印日志
            log.warn(ResultCode.FAILED_BOARD_BANNED.toString());
            //返回响应
            return AppResult.failed(ResultCode.FAILED_BOARD_BANNED);
        }
        //封装文章对象
        Article article=new Article();
        article.setTitle(title); //标题
        article.setContent(content); //正文
        article.setBoardId(boardId);  //板块Id
        article.setUserId(user.getId());  //作者Id
        //调用Service
        articleService.create(article);
        //响应
        return AppResult.success();
    }

    @ApiOperation("获取帖子列表")
    @GetMapping("/getAllByBoardId")
    public AppResult<List<Article>> getAllByBoardId (@ApiParam("板块Id") @RequestParam(value = "boardId",required = false)  Long boardId){

        //定义返回的集合
        List<Article> articles;
        if (boardId==null){
            //查询所有
            articles = articleService.selectAll();
        }else {
           articles = articleService.selectAllByBoardId(boardId);
        }

        //结果是否为空
        if (articles==null){
            //如果结果集为空，那么创建一个空集合
            articles=new ArrayList<>();
        }
        //响应结果
        return AppResult.success(articles);
    }

    @ApiOperation("根据帖子Id获取详情")
    @GetMapping("/details")
    public AppResult<Article> getDetails (HttpServletRequest request,
                                          @ApiParam("帖子Id") @RequestParam("id") @NonNull Long id){
        //从session中获取当前登录用户
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);

        //调用Service，获取帖子详情
        Article article=articleService.selectDetailById(id);
        //判断结果是否为空
        if(article==null){
            //返回错误信息
            return AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS);
        }
        //判断当前用户是否为作者
        if (user.getId()==article.getUserId()){
            //标识为作者
            article.setOwn(true);
        }

        //返回结果
        return AppResult.success(article);
    }

    @ApiOperation("修改帖子")
    @PostMapping("/modify")
    public AppResult modify(HttpServletRequest request,
                            @ApiParam("帖子Id") @RequestParam("id") Long id,
                            @ApiParam("帖子标题") @RequestParam("title") String title,
                            @ApiParam("帖子正文") @RequestParam("content") String content){
        //获取当前登录的用户
        HttpSession session=request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        //校验用户状态
        if (user.getState()==1){
            //返回错误描述
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //查询帖子详情
        Article article = articleService.selectById(id);
        //校验帖子是否有效
        if (article==null){
            //返回错误描述
            return AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS);
        }
        //判断用户是不是作者
        if (user.getId()!=article.getUserId()){
            //返回错误描述
            return AppResult.failed(ResultCode.FAILED_FORBIDDEN);
        }
        //判断帖子的状态-已归档
        if (article.getState()==1||article.getDeleteState()==1){
            //返回错误描述
            return AppResult.failed(ResultCode.FAILED_FORBIDDEN);
        }

        //调用Service
        articleService.modify(id,title,content);

        //打印日志
        log.info("帖子更新成功。Article id= "+id+"user id= "+user.getId()+".");
        //返回正确的结果
        return AppResult.success();
    }

    @ApiOperation("点赞")
    @PostMapping("/thumbsUp")
    public AppResult thumbsUp(HttpServletRequest request,
                              @ApiParam("帖子Id") @RequestParam("id") @NonNull Long id){
        //校验用户的状态
        HttpSession session=request.getSession(false);
        User user= (User) session.getAttribute(AppConfig.USER_SESSION);
        //判断用户是否被禁言
        if (user.getState()==1){
            //返回结果
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //调用Service
        articleService.thumbsUpById(id);
        //返回结果
        return AppResult.success();
    }

    @ApiOperation("删除帖子")
    @PostMapping("/delete")
    public AppResult deleteById (HttpServletRequest request,
            @ApiParam("帖子Id") @RequestParam("id") @NonNull Long id){
        //校验用户的状态
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        if (user.getState() == 1){
            //表示用户禁言
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //查询帖子详情
        Article article = articleService.selectById(id);
        //校验帖子状态
        if (article == null || article.getDeleteState() == 1){
            //帖子已删除
            return AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS);
        }
        //校验当前用户是不是作者
        if (user.getId()!=article.getUserId()){
            return AppResult.failed(ResultCode.FAILED_FORBIDDEN);
        }
        //调用Service
        articleService.deleteById(id);
        //返回操作成功
        return AppResult.success();
    }

    @ApiOperation("获取用户的帖子列表")
    @GetMapping("/getAllByUserId")
    public AppResult<List<Article>> getAllByUserId(HttpServletRequest request,
                                    @ApiParam("用户Id") @RequestParam(value = "userId",required = false) Long userId){
        //如果UserId为空，那么从session中获取当前登录的用户Id
        if (userId == null){
            //获取session
            HttpSession session = request.getSession(false);
            //获取User对象
            User user= (User) session.getAttribute(AppConfig.USER_SESSION);
            userId=user.getId();
        }
        //调用service
        List<Article> articles = articleService.selectByUserId(userId);
        //返回结果
        return AppResult.success(articles);
    }
}
